#Webasto airtop 2000s code

One thing is the burner is never starting up. Sometimes the pump stops clicking after a few seconds and other times it stays on. With the pipe disconnected at the heater end (with heater switched on) fuel does not shoot out (should it?). However there is no blockage in the pipes (I have confirmed this), and the pump seems to be working fine (I also have a replacement pump which I've tried with no difference) - it clicks and when the output of the pump is disconnected the fuel is shooting out. One thing is I don't believe fuel is getting into the heater. Then back to f03 which is the most consistent, but the voltage is fine. Over the course of trying a few more times I got error f08 followed by f01, which seemed random. Mostly the heater does stay on for a few minutes but then turns off on its own - however sometimes it starts and turns off after only a few seconds. I checked the voltage from the heater and then at the fuse box and both showed 13.69v. The next few times the heater started up and stayed on with a good strong output of cold air, but I constantly got error f03. Realising this was the pump I disconnected the lead to the pump and reconnected it which seemed to fix it (I don't think I'd pushed it all the way in).

#Webasto airtop 2000s code

The first time it was started up today the heater blew cold air and turned off after a few seconds, with error code f07. However testing it today it's just blowing cold air. I last turned on this heater (12v diesel) a year ago where it was working perfectly.